freeCodeCamp/curriculum/challenges/chinese/08-coding-interview-prep/rosetta-code/jaro-distance.chinese.md

4.0 KiB
Raw Blame History

title id challengeType videoUrl localeTitle
Jaro distance 5a23c84252665b21eecc7ec2 5 Jaro距离

Description

Jaro距离是两个弦之间相似性的度量。两个弦的Jaro距离越高弦越相似。对得分进行归一化使得0等于没有相似性, 1等于完全匹配。定义两个给定字符串\s_1 \)和\s_2 \的Jaro距离\d_j \)是\ begin {align} d_j = \ begin {cases} 0 && \ text {if} m = 0 \\\ \ {\ frac {1} {3}} \ left{\ frac {m} {| s_ {1} |}} + {\ frac {m} {| s_ {2} |}} + {\ frac { mt} {m}} \ right&& \ text {otherwise} \ end {cases} \ end {align}其中:
  • \m \)是匹配字符的数量;
  • \t \)是换位次数的一半。
分别来自\s_1 \)和\s_2 \)的两个字符只有在相同且不远于\\ left \ lfloor \ frac {\ max| s_1 || s_2 |}时才被认为是匹配的 {2} \右\ rfloor-1 \)。将\s_1 \)的每个字符与\s_2 \中的所有匹配字符进行比较。匹配但不同的序列顺序字符除以2的数量定义了转置的数量。 示例给定字符串\s_1 \ DWAYNE和\s_2 \ DUANE我们发现:
  • \m = 4 \
  • \| s_1 | = 6 \
  • \| s_2 | = 5 \
  • \t = 0 \
我们发现Jaro得分为\d_j = \ frac {1} {3} \ left\ frac {4} {6} + \ frac {4} {5} + \ frac {4-0} {4} \ right= 0.822 \。编写一个函数a它接受两个字符串作为参数并返回相关的Jaro距离。

Instructions

Tests

tests:
  - text: <code>jaro</code>应该是一个功能。
    testString: 'assert(typeof jaro=="function","<code>jaro</code> should be a function.");'
  - text: '<code>jaro(&quot;&quot;+tests[0][0]+&quot;&quot;,&quot;&quot;+tests[0][1]+&quot;&quot;)</code>应返回一个数字。'
    testString: 'assert(typeof jaro(tests[0][0],tests[0][1])=="number","<code>jaro()</code> should return a number.");'
  - text: '<code>jaro(&quot;&quot;+tests[0][0]+&quot;&quot;,&quot;&quot;+tests[0][1]+&quot;&quot;)</code>应该返回<code>&quot;+results[0]+&quot;</code> 。'
    testString: 'assert.equal(jaro(tests[0][0],tests[0][1]),results[0],"<code>jaro(""+tests[0][0]+"",""+tests[0][1]+"")</code> should return <code>"+results[0]+"</code>.");'
  - text: '<code>jaro(&quot;&quot;+tests[1][0]+&quot;&quot;,&quot;&quot;+tests[1][1]+&quot;&quot;)</code>应返回<code>&quot;+results[1]+&quot;</code> 。'
    testString: 'assert.equal(jaro(tests[1][0],tests[1][1]),results[1],"<code>jaro(""+tests[1][0]+"",""+tests[1][1]+"")</code> should return <code>"+results[1]+"</code>.");'
  - text: '<code>jaro(&quot;&quot;+tests[2][0]+&quot;&quot;,&quot;&quot;+tests[2][1]+&quot;&quot;)</code>应返回<code>&quot;+results[2]+&quot;</code> 。'
    testString: 'assert.equal(jaro(tests[2][0],tests[2][1]),results[2],"<code>jaro(""+tests[2][0]+"",""+tests[2][1]+"")</code> should return <code>"+results[2]+"</code>.");'
  - text: '<code>jaro(&quot;&quot;+tests[3][0]+&quot;&quot;,&quot;&quot;+tests[3][1]+&quot;&quot;)</code>应返回<code>&quot;+results[3]+&quot;</code> 。'
    testString: 'assert.equal(jaro(tests[3][0],tests[3][1]),results[3],"<code>jaro(""+tests[3][0]+"",""+tests[3][1]+"")</code> should return <code>"+results[3]+"</code>.");'
  - text: '<code>jaro(&quot;&quot;+tests[4][0]+&quot;&quot;,&quot;&quot;+tests[4][1]+&quot;&quot;)</code>应该返回<code>&quot;+results[4]+&quot;</code> 。'
    testString: 'assert.equal(jaro(tests[4][0],tests[4][1]),results[4],"<code>jaro(""+tests[4][0]+"",""+tests[4][1]+"")</code> should return <code>"+results[4]+"</code>.");'

Challenge Seed

function jaro (s, t) {
  // Good luck!
}

After Test

console.info('after the test');

Solution

// solution required